MAX14855GWE+T

Drivers, Receivers, Transceivers Overview

The MAX14855GWE+T is a full-duplex isolated RS-485/RS-422 transceiver providing 2750VRMS galvanic isolation between the UART-side and cable-side. It supports data rates up to 25Mbps with one driver and one receiver channel. The device features an integrated 450kHz transformer driver for power transfer across the isolation barrier and an internal LDO outputting 3.3V (typical) on VDDB. Driver outputs and receiver inputs are protected against ±35kV electrostatic discharge (HBM). Operating supply voltages range from 3.0V to 5.5V for both VDDA and VDDB, with operation guaranteed over a temperature range of -40°C to +105°C in a wide 16-pin SOIC package.

Drivers, Receivers, Transceivers Feature Summary

• Integrated transformer driver enables power transfer across the isolation barrier using an external center-tapped transformer.
• Internal low-dropout regulator provides a space-efficient architecture for powering the cable-side circuitry.
• High-performance transceiver supports flexible designs with maximum data rates up to 25Mbps.
• Integrated protection ensures robust communication through ±35kV ESD protection and thermal shutdown capabilities.

Drivers, Receivers, Transceivers Applications

• Industrial Automation Equipment
• Programmable Logic Controllers
• HVAC Systems
• Power Meters

Drivers, Receivers, Transceivers Procurement Notes

Verify component authenticity by checking the manufacturer's marking code and date code against official documentation. Ensure the ordering suffix matches the required reel or cut tape packaging specifications. Confirm that the specific variant aligns with the intended isolation voltage and data rate requirements for the target application design.

Drivers, Receivers, Transceivers Selection Notes

Select this model when high-speed communication up to 25Mbps is required alongside galvanic isolation. The integrated transformer driver simplifies the design by eliminating the need for separate isolated power supplies. Ensure the external transformer selected meets the minimum ET product requirement to prevent saturation during operation at maximum supply voltages.

Drivers, Receivers, Transceivers Part Context

This component belongs to the MAX1485x family of isolated transceivers, which also includes the MAX14853 variant limited to 500kbps. The MAX14855 specifically targets applications requiring higher throughput while maintaining safety regulatory approvals such as UL1577 certification for basic insulation ratings.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX14853EWE+T serves as a lower-speed alternative within the same family, offering 500kbps performance. Verify pin compatibility and isolation voltage ratings before substitution, as functional differences exist regarding maximum data throughput and slew-rate limiting characteristics.